12 Lead ECGs

How many electrodes a typically used on a 12 lead ECG?

• 10
• 12
• 6

• 4

The LIMB electrodes are placed on which part of the body?

• Chest

• Abdomen

• Arms and Legs

• Neck and Shoulders

The PRECORDIAL electordes are placed on which part of the body?

• Chest

• Abdomen

• Arms and Legs

• Neck and Shoulders

Why is it important to prepare the skin before attaching electrodes for an ECG?

• • To prevent electrical interference from other devices

• • To improve electrode adhesion and signal quality

• • To ensure patient comfort during the test

• • To maintain a sterile environment

Which type of electrocardiograms (ECG) requires the use of 10 electrodes?

• Resting ECG

• Stress Test ECG

• Ambulatory ECG

• Telemetry ECG

Where are the limb electrodes placed during a Stress Test ECG?

• Wrists & Ankles

• Shoulders & Ankles

• No electrodes are used on the arms & legs

• Closer to the trunk of the body

Organize these options into the right categories

Groups:

(a) Resting ECG

,

(b) Stress Test ECG

,

(c) Both

• Skin Prep

• Takes about 5-10 minutes

• Vital signs are monitored

• Diet restrictions

• Remain still & avoid talking

• Educate patient & make them feel comfortable

• Physical exertion

• Patient Identification

• Patient lays in supine/semi fowler position

Which of the following should prompt immediate stopping of a stress test?

• Moderate increase in heart rate

• Gradual increase in respiratory rate

• Drop in blood pressure with dizziness

• Mild sweating

Match the following electrodes to their location

• 5th ICS, anterior axillary line

• v4

• 5th ICS, midaxillary line

• v6

• 4th ICS, left side of sternum

• v2

• 4th ICS, right side of sternum

• v5

• 5th ICS, midclavicular line

• v1

Which lead is placed at the left midclavicular line in the 5th intercostal space?

• v2

• v4

• v5

• v6